Psychology is the science of mental life.
The higher the monkey climbs, the more it shows its tail.
To write is to resist the forces of forgetting.
孔子说:“生来就知道的,是上等人;学习后才知道的,是二等人;遇到困难才学习的,是三等人;遇到困难也不学习的,这就是下等人了。”